Question

a3=15 and s10=125 find a and d10​

Answer 1

Answer:

a=15/3

a=5

and d=125/10

d=12.5

Answer 2

given a3=15 s10=125 a=? a10=? now a+2d=15 a=15 -2d s10=n/2 (2a+(n-1)d) d=-1 a=13 a10=4